I was thinking of building my own tig cooler. I still might but I really like the idea of the direct connect to the back of the Powertig 250EX for the cooler they sell. It is on when the tig machine is on and that takes one more thing to think about out of the equation. If I can find a 240 volt small electric motor to run a pump, then I may still build it. But for the price, I can't see building one right now because the price of the parts is about where I would be if I bought a new cooler from Everlast. Plus the one from Everlast is green, 240 volts and looks cool too! I know the coolers are hard to come by so I still might build one if I can't wait. Right now I'm cooling with the old stand by garden hose.